Why does my rosary brochure suggest saying the mysteries
on certain days of the week during most of the year and
changing those days during lent and advent?

Answer by Richard Geraghty on 1/30/2014:

Dear Bill,

The Church has a vivid sense of the passage of time. Just as the year moves through it four
seasons, so the Church moves through the time before and during the coming of Christ. Our
redemption is hooked up with time. Hence the different seasons of the year and the liturgy
make a difference in our understanding of the mysteries involved.